Search results for "cartografia"
showing 10 items of 325 documents
L'ordine del mondo. Nota sulla cartografia
2020
Il saggio riflette sul valore simbolico e culturale della cartografia e delle carte come documento storico. Se da una parte infatti la cartografia ambisce ad essere rappresentazione realistica del mondo, in quanto resa in piano dell’orizzonte geografico conosciuto, in rapporto con le conoscenze e il grado di convenzionalità e di astrazione raggiunti, dall’altra, per una lunga fase, la carta geografica è inscindibile dalla cultura figurativa del suo tempo ed è segno tangibile del sistema ideologico di riferimento dominante. La carta è oggetto da guardare e da leggere. Il grado di “realismo” tuttavia è connesso appunto al livello delle cognizioni tecnico-scientifiche conseguite e delle modell…
Recensione al volume Burini F., Cartografia partecipativa. Mapping per la governance ambientale e urbana, FrancoAngeli, Milano, 2016
2018
Recensione al volume Burini F., Cartografia partecipativa. Mapping per la governance ambientale e urbana, FrancoAngeli, Milano, 2016
Monitoring displacements of an earthen dam using GNSS and remote sensing
2014
This paper shows the results of a scientific research in which a GNSS continuous monitoring system for earth-dam deformations has been developed, then, deformations have been related with reservoir water surface and level. The experiment was conducted near Bivona (Sicily, Italy), on the Castello dam (Magazzolo Lake). On the top of the dam three control points were placed and three GNSS permanent stations were installed. The three stations continuously transmitted data to the control centre of the University of Palermo. The former has been determined using freely available satellite data (specifically Landsat 7 SLC-Off) collected during the whole study period (DOYs 101 to 348 2011). Issues r…
Detection of a reservoir water level using shape similarity metrics
2017
The matching between reservoirs’ water edge and digital elevation model’s (DEM) contour lines allowed determining the water level at the acquisition date of satellite images. A preliminary study was conducted on the Castello dam (Magazzolo Lake), between Alessandria della Rocca and Bivona (Agrigento, south-Italy). The accuracy assessment of the technique was than evaluated from the comparison between classified and reference objects using similarity metrics about the shape, theme, edge and position, through the plugin STEP of open source software GIS. Moreover, an independent GIS technique was implemented to evaluate the water level, based on a distances’ array between existing contour line…
Siose Valencia 2005: resultados, aplicaciones y comparación con Corine
2011
SIOSE, Spanish acronym standing for Land Cover and Use Information System of Spain, is the most detailed Geographic Information System ever created in Spain about land cover and land use. This GIS gives objective information, photo-interpreted from aerial and satellite imagery, describing the different land covers and land uses. Since SIOSE gathers a big deal of information (more than 157.000 different polygons just in the Land of Valencia), the quantity of possible researches coming from it is huge and ranging from environmental and biodiversity subjects to agricultural or urban areas topics. These possible researches would be especially appropriate on a local level, since SIOSE has a very…
Surface soil water content estimation based on thermal inertia and Bayesian smoothing
2014
Soil water content plays a critical role in agro-hydrology since it regulates the rainfall partition between surface runoff and infiltration and, the energy partition between sensible and latent heat fluxes. Current thermal inertia models characterize the spatial and temporal variability of water content by assuming a sinusoidal behavior of the land surface temperature between subsequent acquisitions. Such behavior implicitly supposes clear sky during the whole interval between the thermal acquisitions; but, since this assumption is not necessarily verified even if sky is clear at the exact epoch of acquisition, , the accuracy of the model may be questioned due to spatial and temporal varia…
Mapping evapotranspiration on vineyards: The Sentinel-2 potentiality
2012
stimation of actual evapotranspiration in Sicilian vineyards, is an emerging issue since these agricultural systems. Indeed unlike other agricultural species (Vitis vinifera L. ) are generally cultivated under mild water stress, in order to enhance quality (Guadillère et al. , 2002. This has significant impacts on the management of the scarce water resources of the region. The choice of the most appropriate methodology for assessing water use in these systems is still an issue of debating, due to the complexity of canopy and root systems and for their high spatial fragmentation. In vineyards, quality and quantity of the final product are dependent on the controlled stress conditions to be s…
Proximal-sensing-powered modelling of energy-water fluxes in a vineyard: A spatial resolution analysis
2021
Spatial resolution is a key parameter in energy–water surface flux modelling. In this research, scale effects are analyzed on fluxes modelled with the FEST-EWB model, by upscaling both its inputs and outputs separately. The main questions are: (a) if high-resolution remote sensing images are necessary to accurately model a heterogeneous area; and (b) whether and to what extent low-resolution modelling provides worse/better results than the upscaled results of high-resolution modelling. The study area is an experimental vineyard field where proximal sensing images were obtained by an airborne platform and verification fluxes were measured via a flux tower. Modelled fluxes are in line with th…
Assessing daily actual evapotranspiration through energy balance: an experiment to evaluate the selfpreservation hypothesis with acquisition time
2013
An operational use of the actual evapotranspiration estimates requires the integration from instantaneous to daily values. This can commonly be achieved under the hypothesis of daytime self-preservation of the evaporative fraction. In this study, it has been evaluated the effect of this assumption on the assessment of daily evapotranspiration from proximity sensing images acquired at hourly intervals over a homogeneous olive groove. Results have been validated by comparison with observations made by a micrometeorological (EC-flux tower) and an eco-physiological (sap flux) sensor. SEBAL model has been applied to thermal and multispectral images acquired during a clear day on August 2009 trou…
Il monitoraggio topografico della cattedrale di Agrigento con metodi tradizionali
2014
L’oggetto del presente lavoro è il monitoraggio della cattedrale di San Gerlando di Agrigento, duomo eretto tra i secoli XI e XII, che sorge nella parte più alta della collina di Girgenti. Lo studio è significativo poiché, nel corso dei secoli la costruzione è stata soggetta a interventi di ristrutturazione e di consolidamento, resi necessari dai danni arrecati da frane che, in più occasioni, hanno coinvolto il territorio su cui essa sorge. Dal 2010 la chiesa è chiusa al culto per copiosi eventi franosi e idrogeologici che hanno allarmato ulteriormente anche la Protezione Civile. A seguito di questi eventi è stata avviata una campagna di indagini e monitoraggi con il fine della caratterizza…